Edmunds.com | Inside Line | Auto Observer Your Account | Help | Directory
You are here:
![[F]](http://a332.g.akamai.net/f/332/936/12h/www.edmunds.com/media/townhall/webxicons/site.gif){kind=small}
Forums
Maintenance & Repair Fuel and Oil Additives
1246 messages, Last post on Sep 28, 2009 at 7:37 AM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
|
|
|---|---|
|
FYI: http://www.magnalabs.com/aslcamguard/formula.php was a surprise find as it's about autos and the FTC lawsuits - they've a separate page dealing with aircraft. ....and if I am accused of backsliding, so be it. It discussed autos. ....last mention until new version.  Changing gears again: What's going on with Audi? I read on one consumer affairs web page that Audi now recommends synthetic oil changed at 5K miles, but Audi owners manuals (some of them, anyway) recommend any premium oil changed at 10K miles. The latter procedure usually brought about sludge. Manufacturers really confuse things when their manuals say one thing, and the advisors say something else. 
|
|
|
Replying to: kurtamaxxxguy (May 14, 2009 10:16 am) The latter procedure usually brought about sludge." I'm not sure where you got that. Audi has required the use of synthetic oil that meets at least the VW 502.00 oil specification (which most synthetic oils are incapable of meeting) for years now. As far as I know, there hasn't been a single Audi sold in North America that allowed the use of "any premium oil" since at least 2003.
|
|
|
|
|
Replying to: shipo (May 14, 2009 10:58 am) That explains it as most of the forum entries were about older Audis. http://www.consumeraffairs.com/automotive/audi_sludge.html is the web page I saw. I also see that there's a 503 spec for VW oils that's for their higher powered engines, learning that from a Shipo post on the Edmunds VW Passat Oil Issues forum. Would be interesting to know if there's been publication or analysis explaining exactly how it differs from 502 spec. |
|
|
Replying to: kurtamaxxxguy (May 14, 2009 10:16 am)
|
|
|
Replying to: roland3 (May 16, 2009 10:57 pm) Best regards, Shipo |
|
|
|
|
http://www.avweb.com/news/savvyaviator/savvy_aviator_52_thinking_about_oil_chang- es_196730-1.html talks about TEL (am surprised they're still using TEL in Aviation fuel), acid attacks on engines, and ways oil can get contaminated. Granted, article pertains mainly to Aircraft, but is interesting wrt oil breakdown. Aside; how many countries on Earth still use Leaded gasoline?
|
|
|
Replying to: kurtamaxxxguy (May 18, 2009 6:56 pm)
|
|
|
|
|
Replying to: roland3 (May 19, 2009 2:40 am)
|
|
|
|
|
Replying to: Mr_Shiftright (May 19, 2009 6:33 am) I assume this oil consumption is not from bad tolerances, but design strategy. Where is the oil consumed from? The valve seals? The piston walls/rings? If from walls/rings, perhaps the oil consumption is to provide more thorough lubrication and/or piston cooling? |
|
|
|
|
I once sold my sweet running 1984 RX7 to a guy I knew. This car ran like a dream until one day he had his oil changed and the shop suggested he use synthetic instead of the regular stuff I had always used. Several hundred miles later, he blew the engine. He had it towed to a well known shop in the area that only works on RX-7's. And the first question they asked him was had he put synthetic oil in it ? I know how wonderful a lot of people think synthetics are but I won't use them. For me the regualr oil works just fine!
|
|
You are here:
Forums
Maintenance & Repair Fuel and Oil Additives
